VISUAL MEMORY AND THE PERCEPTION OF A STABLE VISUAL ENVIRONMENT
VISUAL MEMORY AND THE PERCEPTION OF A STABLE VISUAL ENVIRONMENT
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DOI：
10.3758/bf03208162
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发表时间：
1990-01-01
期刊：
影响因子：
--
通讯作者：
BROWN, JS
中科院分区：
文献类型：
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作者：
IRWIN, DE;ZACKS, JL;BROWN, JS
尽管眼睛在运动，但视觉世界看起来稳定和连续。关于知觉是如何实现的一个假设是，连续凝视的内容根据环境坐标在记忆中融合。两个实验未能支持这一假设；它们表明，S在扫视前的同一空间位置呈现相同空间频率的栅格不会影响其对扫视后呈现的栅格的检测能力。第三个实验测试了知觉稳定性的另一种解释，该解释声称，连续注视的内容会在不同的眼跳中进行比较，而不是融合，从而使人们能够确定世界是否保持稳定。这一假设得到了支持：有经验的受试者能够准确地判断成功注视中的两种模式是相同还是不同，即使这两种模式出现在整个眼跳的不同空间位置上。综上所述，这些结果表明，跨眼跳的知觉稳定性和信息整合依赖于对环境中物体相对位置的记忆，而不是来自连续注视的视觉信息的空间融合。
The visual world appears stable and continuous despite eye movements. One hypothesis about how ths perception is achieved is that the contents of successive fixations are fused in memory according to environmental coordinates. Two experiments failed to support this hypothesis; they showed that one''s ability to detect a grating presented after a saccade is unaffected by the presentation of a grating with the same spatial frequency in the same spatial location before the saccade. A third experiment tested an alternative explanation of perceptual stability that claims that the contents of successive fixations are compared, rather than fused, across saccades, allowing one to determine whether the world has remained stable. This hypothesis was supported: Experienced subjects could accurately determine whether two patterns viewed in sucessive fixations were identical or different, even when the two patterns appeared in different spatial positions across the saccade. Taken together, these results suggest that perceptual stability and information integration across saccades rely on memory for the relative positions of objects in the environment, rather than on the spatiotopic fusion of visual information from successive fixations.